---
type: faq
title: "What is the minimum size Postcard the USPS will accept for mailings?"
description: "The smallest postcard the USPS will accept for mailing is 3.5 inches by 5 inches. Anything smaller than 3.5' x 5' is nonmailable and will be returned Cards"
resource: https://www.4over4.com/faqs/marketing-materials/what-is-the-minimum-size-postcard-the-usps-will-accept-for-mailings
tags: ["Marketing Materials", "faq"]
timestamp: 2026-07-20T18:54:40.856Z
---

# What is the minimum size Postcard the USPS will accept for mailings?

The smallest postcard the USPS will accept for mailing is 3.5 inches by 5 inches. Anything smaller than 3.5' x 5' is nonmailable and will be returned Cards

Part of the **Marketing Materials** hub. See [all faq concepts](index.md).

- Page type: faq
- Hub: Marketing Materials
- URL: https://www.4over4.com/faqs/marketing-materials/what-is-the-minimum-size-postcard-the-usps-will-accept-for-mailings